Procedure for Comparing the Monitor Reading with Laboratory Result

L

lumpylumfy

#1
I want to know what calculation this report used for calculated Bias formula.

Gas-in-oil standard S =100 ppm, laboratory result for S = 90 ppm
Laboratory result for 4 duplicate sample = 250, 230, 210 and 240 ppm
laboratory result corrected for bias = 275, 254, 231, 263 ppm

How they get (The red bold) result from bias calculation.

I just know its tell ' calculate the bias of the laboratory by comparing its results for the gas-in-oil standard sample to what was actually prepared'

I calculate the bias factor [10/11] mean 250 multiply with [10/11] get 274.

So what formula its use..here I attached the paper for reference.

I hope you all helping me out. I already google and find the answer for a month.
 

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Marc

Hunkered Down for the Duration
Staff member
Admin
#2
My Thanks in advance to anyone who can help with this unanswered question. And, should you be browsing threads and find this one, and it still has no reply, if you can help we will all appreciate it.
 
L

lumpylumfy

#4
I also read several journal and read again the report from CIGRE Report 409 Working Group D1.01 (TF 15) Report on Gas Monitor Oil-Filled Electrical Equipment . To looking again if I miss something.

:thanks:
 
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Statistical Steven

Statistician
Staff member
Super Moderator
#5
Looks like they correct the measured values by the percent bias between the standard and the lab result (100-90)/100 which is 10%. Multiple the unadjusted values by 10% you get the adjusted values.


I want to know what calculation this report used for calculated Bias formula.

Gas-in-oil standard S =100 ppm, laboratory result for S = 90 ppm
Laboratory result for 4 duplicate sample = 250, 230, 210 and 240 ppm
laboratory result corrected for bias = 275, 254, 231, 263 ppm

How they get (The red bold) result from bias calculation.

I just know its tell ' calculate the bias of the laboratory by comparing its results for the gas-in-oil standard sample to what was actually prepared'

I calculate the bias factor [10/11] mean 250 multiply with [10/11] get 274.

So what formula its use..here I attached the paper for reference.

I hope you all helping me out. I already google and find the answer for a month.
 
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